Littleton, CO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Littleton, a city in Arapahoe County, Colorado.
Today
81°F
Patchy Smoke
Patchy smoke before noon, then patchy smoke and a slight chance of showers and thunderstorms. Mostly sunny. High near 81, with temperatures falling to around 78 in the afternoon. Northeast wind around 8 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Littleton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Patchy Smoke | 8 mph NE | 23% |
| Tonight | 58°F | Patchy Smoke | 2 to 8 mph N | 12% |
| Wednesday | 88°F | Patchy Smoke then Sunny | 2 to 8 mph NNE | 0% |
| Wednesday Night | 61°F | Mostly Clear | 5 to 8 mph SSE | 4% |
| Thursday | 97°F | Sunny | 2 to 9 mph N | 0% |
| Thursday Night | 63°F | Clear | 6 to 9 mph S | 2% |
| Friday | 99°F | Sunny | 5 to 8 mph E | 0% |
| Friday Night | 68°F | Mostly Clear | 10 mph S | 1% |
| Saturday | 100°F | Sunny | 9 mph NE | 0% |
| Saturday Night | 68°F | Partly Cloudy | 9 mph S | 1% |
| Sunday | 99°F | Sunny | 8 mph E | 8% |
| Sunday Night | 68°F | Partly Cloudy | 8 mph W | 3% |
| Monday | 98°F | Sunny | 6 to 10 mph NW | 14% |
| Monday Night | 67°F | Partly Cloudy | 5 to 10 mph W | 13% |
Forecast source: National Weather Service (api.weather.gov) for Littleton (39.590, -105.020). Updated through the day.
Growing snapshot for Littleton
Last spring frost
May 2
First fall frost
Oct 11
Growing season
160 days
Hardiness zone
6a
More local growing data for Littleton: nearby ZIP 80120 weather · frost dates · planting calendar · Colorado frost dates
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Climate data from the nearest NOAA station, Marston Fltr Plt, Co (3.4 mi from Littleton). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.